Expression of type ExprTuple

from the theory of proveit.logic.sets.enumeration

import proveit
# Automation is not needed when building an expression:
proveit.defaults.automation = False # This will speed things up.
proveit.defaults.inline_pngs = False # Makes files smaller.
%load_expr # Load the stored expression as 'stored_expr'
# import Expression classes needed to build the expression
from proveit import ExprTuple, a, b
from proveit.logic import Set

# build up the expression from sub-expressions
sub_expr1 = Set()
sub_expr2 = Set(a)
sub_expr3 = Set(b)
sub_expr4 = Set(a, b)
expr = ExprTuple(Set(sub_expr1, sub_expr2, sub_expr3, sub_expr4), Set(sub_expr2, sub_expr3, sub_expr1, sub_expr4))

expr:

# check that the built expression is the same as the stored expression
assert expr == stored_expr
assert expr._style_id == stored_expr._style_id
print("Passed sanity check: expr matches stored_expr")

Passed sanity check: expr matches stored_expr

# Show the LaTeX representation of the expression for convenience if you need it.
print(stored_expr.latex())

\left(\left\{\left\{\right\}, \left\{a\right\}, \left\{b\right\}, \left\{a, b\right\}\right\}, \left\{\left\{a\right\}, \left\{b\right\}, \left\{\right\}, \left\{a, b\right\}\right\}\right)

stored_expr.style_options()

name	description	default	current value	related methods
wrap_positions	position(s) at which wrapping is to occur; 'n' is after the nth comma.	()	()	('with_wrapping_at',)
justification	if any wrap positions are set, justify to the 'left', 'center', or 'right'	left	left	('with_justification',)

# display the expression information
stored_expr.expr_info()

	core type	sub-expressions	expression
0	ExprTuple	1, 2
1	Operation	operator: 12 operands: 3
2	Operation	operator: 12 operands: 4
3	ExprTuple	7, 5, 6, 8
4	ExprTuple	5, 6, 7, 8
5	Operation	operator: 12 operand: 14
6	Operation	operator: 12 operand: 15
7	Operation	operator: 12 operands: 11
8	Operation	operator: 12 operands: 13
9	ExprTuple	14
10	ExprTuple	15
11	ExprTuple
12	Literal
13	ExprTuple	14, 15
14	Variable
15	Variable